<?xml version="1.0"?>
<!DOCTYPE article PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd">
<article xmlns="http://docbook.org/ns/docbook">
  <section id="main_title">
    <title>Main Title</title>
    <paragraph>Hello world</paragraph>
  </Section>
</article>
